Malicious PDF — malware analysis report

Static analysis result for SHA-256 10178fd8601718ae…

MALICIOUS

PDF

81.7 KB Created: 2021-02-22 23:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: eb3434ece470d2a90a894ccac5de3440 SHA-1: 97cf9d020995bbf3f36f67f46d1e21816b9ce621 SHA-256: 10178fd8601718ae010ae9fb2dee9e95f253da68d07786148bb453aceaa2aebd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to various resources, including what appears to be a movie download site and a link farm, indicating a multi-purpose malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/strik?utm_term=aqa+a+level+psychology+textbook+online+free PDF link annotation
    • http://verifiedbadges-form.com/filmywap_2018_bollywood_latest_movies_freep2hgd.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/Pjg1Wja/23737971893.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/jgjihiB/81310737578.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jXXfhDT/gitufafususikubixokulof.pdfIn PDF document text
    • http://azorocheat6.xyz/how_to_be_a_construction_safety_inspectornhnmi.pdfIn PDF document text
    • http://sipebep.22web.org/colorado_elk_harvest_report.pdfIn PDF document text
    • http://tevfikyuce.xyz/87396866064oap4v.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/hYiajgS/friday_the_13th_game_killer_puzzle_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/pibusupi/jfxhhhg/93022457467.pdfIn PDF document text
    • https://rurajisikite.weebly.com/uploads/1/3/0/8/130813509/bodisuwogababugota.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/DjcDOET/street_fighter_4_apk_androidgamegratisan.pdfIn PDF document text
    • http://sorewoforami.22web.org/aiims_raipur_office_assistant_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/elPBhgl/drift_donuts_rochester_mn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubezowi.epizy.com/christian_movies_free_offline.pdfIn PDF document text
    • http://mukokulag.epizy.com/brussels_tourist_information.pdfIn PDF document text
    • http://rigirulame.epizy.com/waboganogitug.pdfIn PDF document text
    • http://wolawozel.epizy.com/gamibe.pdfIn PDF document text
    • http://nejovafejasujob.rf.gd/bisizerapatofonimigovef.pdfIn PDF document text
    • http://zasagugidi.epizy.com/dokigodiloxusitetuxupi.pdfIn PDF document text
    • http://mujeburesi.epizy.com/what_is_the_mileage_of_fz_v2.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 5824 bytes
SHA-256: 787d2ca2689dba3161b0392a2f5d8bb94d99d1c9218343289b83a5d2e0349932
font_01_sfnt_off0001120d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120D 11696 bytes
SHA-256: 5c004222c25598861fd1c8c5d3de73057ee3a3d7ad4f4fec1fd5fa74f9ebd428

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